Transmission



Oct. 24, 1939. v. E. GLEASMAN 2,177,213

TRANSMISSI ON Filed Nov. 5, 1937 5 Sheets-Sheet 1 1 4 iiorneys Oct. 24,1939.

v. E. GLEASMAN TRANSMISSION Filed Nov. 5, 1937 S SheetS-Sheet 2 il m N Qs Q m 4 N RX Wm. Q mm 7/ w x Q Q 1 \Q Q m k. R N\ N Q m{ a h lnvenforOct. 24, 1939. v. E. GLEASMAN 2,177,213

TRANSMISSION Filed Nov. 5, 193' 5 Sheets-Sheet 3 Inventor 1 Vernon Ed'leasmau Afior/xys Oct. 24, 1939. v. E. GLEASMAN TRANSMISSION 5Sheets-Sheet 4 Filed Nov. 5, 1957 M M F n m w Oct. 24, 1939.

V. E. GLEASMAN TRANSMISSION 5 Sheets-Sheet 5 Filed Nov. 5, 1957 m ma I mm 2% ma w w\\\\\\\\\\\\\\\\\ m1 WW Patented o... 24, 1939 UNITED STATESPATENT OFFICE TRANSMISSION Vernon E. Gleasman, Boonvllle, N. Y.

Application November 5, 1937, Serial No. 173,015 2 Claims. (01. 'i4364)This invention appertains to new and useful improvements intransmissions such as are employed in automobile drives and in whichthere are the usual high, low and intermediate gears,

l as well as a reverse gear.

' The principal object of the present invention is to provide atransmission in which the desired gears are connected in drivingrelation by fluid pressure means.

Another important object of the invention is to provide means wherebytransmission gear changing can be accomplished in a much more convenientand efllcient manner than through the agency of means now in generaluse.

other important objects and advantages of the invention will becomeapparent to the reade of the following specification.

In the drawings:

Figure 1 represents a diagrammatic view showm ing the control valve,transmission, and fluid pressure lines connected therewith.

Figure 2 is a fragmentary detail sectional view showing the pump means.

t Figure 3' is a longitudinal sectional view I through the transmissionthe section being taken on the line 3- -3 of Figure 4.

Figure 4 is a vertical sectional view taken substantially on the line4-4 of Figure 3.

Figure 5 is a longitudinal sectional view I through the control valve.

Figure 6 is a sectional view taken substantially on the line 6-6 ofFigure 5.

Figure 7 is a sectional view taken substantially on the line 1-1 ofFigure 5.

Figure 8 is a fragmentary perspective the vertical rotary valve element.

Figure 9 is a fragmentary longitudinal sectional view through a modifiedform of gear clutch.

Referring to Figures 3 and 4, it can be seen that numeral 5 generallyrefers to the transmission and this consists of the case 5 and theremovable cover 'I. Numeral 8 denotes the driven shaft which is disposedthrough the rear wall 3 of the case 5 and through the bearing mount viewof It, terminating at its front end in the large gear II which is formed'with the pocket l2f'or receiving the clutch mechanism generally.referred to by numeral II. This clutch mechanism i3 is located on thedrive shaft section ll which carries the gears I5, l3 and H. The driveshaft section 14 is disposed through the ball bearing mount [3 in thefront wall l3 and has the enlarged portion operating in the case 2|.This 5 case is provided with a pack flange Z1 at each end thereof andhas the nipple 23 extending from the side thereof and connected to thetube 24.

The nipple 23 communicates with the inside of the case 2| at thecircumferentially extending groove 25 in the shaft i4. From this groove25 5 extends a duct which connects with the iongitudinally extendingduct 26' having its forward terminal at the clutch l3.

As shown in Figure 4, the transmission includes the counter assembliesgenerally referred to by numerals 23, 21 and 23, taking care of low geardrive and intermediate gear drive, and thirdly the reverse drive, theassembly 28 of coursedriving shaft 8 in reverse direction by theintermediate gear 29. Each of these shafts 26, 21 and 28 is providedwith a clutch mechanism connected with the shaft i l. The clutchmechanism 80 is shown in Figure 3 for the low gear assembly, whileadditional clutch assemblies are employed (but not shown) for theassemblies 21 and 28 and mesh with the gears l6 and I5 shown in Figure3.

As these assemblies 21 and 28 are constructed in substantially the samemanner as the assembly 26, it is thought that illustration anddescription of the one assembly 26 will suffice.

As is clearly shown in Figure 3, of the assembly 26 numeral 3|represents the countershaft which has one end disposed into the bearingassembly 32 in the rear wall 9. Keyed to this shaft 3| is the pinion 33which meshes with the gear H of the clutch assembly l3.

Numeral 34 represents a barrel on the shaft 3| which carries the camformation 35 and also the large gear 35 which is hollow to accommodatethe clutch mechanism 30 carried by the shaft 3!. This shaft 3i has theduct 31 leading from its clutch 30 to the head 38 at its front end whichis located within the case 39 and provided with packing means 40. Fromthis case 39 in a position opposed to the circumferential groove ii ofthe shaft 3| and communicating with the duct 31 extends the fluid line42. As can be seen in Figure 4, each of these clutches consists of upperand lower shoes 43- each having an inwardly disposed flange 45 adaptedto be straddled by the bifurcated end portion of the correspondingplunger 46. These plungers are slidable through packing glands 41 intheir corresponding shafts, and springs 43 connect the shoes 43-,normally tending to hold the same away from a corresponding gear. Thepressure fluid exerted through the corresponding shaft duct and againstthe plungers 46 serves to urge the plungers outwardly, resulting in thebinding of the shoes 6| hollow and in the form of a sleeve on the shaft89. The shaft 58 carries the large'hollow gear 5!. The shaft 89 has theenlarged formation 52 from which the shaft extension 58 extends. Theshaft extension 53 has the fluid pressure duct 58 therein leading to thelateral ducts 55 which communicate with the cylinders 58 in which theplungers 51 are operative. These plungers 51 operate against thefollower annulus 58 which in turn presses the clutch plates 5988 of theshaft 49 and gear 5! together. This form of clutch is a substitute forthe preferred form as shown in Figure 4.

As shown in Figure 2, numeral 8| generally refers to the pump whichconsists of the body 82 having the leg portion 68 secured by suitablemeans to a support 85. The body 82 has the cylinder bore 86 therein inwhich the plunger 8'! is slidable, this plunger being operative throughthe packing gland 88 and provided with a convex head 89 at its outer endfor riding engagement with the cam 35 on the barrel 38. ure 3.)interposed between the plug of the packing gland 88 and the head 89 is acoiled'compressible spring I8. I

Communicating with the cylinder bore 88 is the duct H which extendslongitudinally of the body 82. Also communicating with the cylinder 88is the pocket 12 in which the ball I3 is operative. The ball I5 acts asa check valve inconjunction with the seat 14, the seat having an openingtherethrough communicating with the duct 15 which extends longitudinallyof the body 82 and is in communication with the pipe line I8. A checkvalve structure 11 is located in the body 82 at the outer end of theduct II and with this connects the tube 18 which supplies fluid underpressure to the valve assembly-generally referred to by numeral 19 andshowhin detail in Figures 5 and 6.

This valve consists of the e1ongated'horiZ'ontally disposed shaft 88,having the head 8i operative in the packing gland 82, the enlargedportion 83 operative in 'thepacking gland 84 and the enlarged head 85operative in the packing gland 88.

In the head 8i the circumferentially extending groove 81 from which aninwardly extending port extends to communicate withthe axially disposedduct 88 in the shaft 88. This duct 88 opens by way of a port 89laterally through the shaft 88 at the packing gland 83 and by rotatingthe shaft 88. this port 89 can be communicated wit any one of the tubes98, 9|, 92 or 93, the tube 3 being for the reverse gear.

Each of these tubes 98, 9| 92 and 93 extends to a T-fitting 98 fromwhich extends a return pipe 95 to the corresponding port in the gland88. At this point the head 85 is provided with a circumferentiallyextending groove 96 whichextends substantially around the entire head 85with the exception of the portion 9' I which serves as a shut-01f forthe various ports in the gland 88 so that as the shaft 88 is rotated tosupply fluid under pressureto any one of the gear coupling clutchesaforementioned, the raised portion 91 will serve as a valve closing thecorresponding return pipe 95 so long as the shaft 88 is holding the port88 in communication with any one 0.1

v is to be shifted to gear reversing position, that (Also see Fig valveI I2 which will pass the fluid into the reserthe pipes 88, 9|, 92 and88. Means for rotating the shaft 88 consists of the cylindricalformation 99 extending laterally from the shaft 88 and having therotatable valve element I88 therein. This is provided with thetransverse port I81 5 normally aligned with the duct 88. The valveelement I88 has the outstanding hand bar I82 extending through thepacking gland I83. The outer end of the hand bar I82 hasthe handle I84.This hand bar andhandle are preferably located adjacent the usualsteering shaft I85 of an automobile structure and clamped to the housingof the shaft by suitable means I 88 is a projecting structure I81 whichserves as a stop for the slidable member I88 on the hand bar I82. Thisslidable member I88 can be lifted'by pulling upwardly on the lever I89,the latter being connected by the rod 8- to the said slidable memberI88. This is only utilized when the'shaft 88 20 is when the port 89 isto be communicated with the tube 93. (See Figures 5 and 7.) When it isdesired to entirely shut off the shaft 88 from the tube 18, the valveelement I88 is rotated.

Referring to the diagrammatic use of Figure 1 it can be seen thatnumeral III represents the ireservoir for the fluid and that between thesupply pipe l8 and the reservoir III is the by-pass 38 voir I IIwhenever the pressure of the system becomes excessive or, when the valveassembly I9 is cut off from the system.

While the foregoing specification sets forth the invention inspecificterms, it is to be understood '33 that numerous changes in theshape, size and material may be resorted to without departing from-thespirit and scope of the invention as claimed hereinafter.

Having described the invention what is claimed to as new'is:

1.. Transmission means of the class described comprising a driven shaft,a gear connected with the driven shaft and having a pocket therein, aplurality of countershafts, a gear on each 318 countershaft meshing withthe gear of the driven shaft, a drive shaft having a part located in thepocket of the gear of the driven shaft. fluid actuated clutch meanscarried by said part of the drive shaft for connecting the drive shaft50 to the gear of the driven shaft, a plurality of gears carried by thedrive shaft, atubular shaft I rotatably arranged on each countershaft, agear carried by each tubular shaft and having a pocket therein, each ofthe gears of the tubular shafts 58 meshing with a gear of the driveshaft, fluid clutch means carried by each countershaft and located in apocket of the gear of the tubular shaft mountedon said countershaft, afluid system including conduits connected with all the m clutch means, apump in the system, means for actuating the pump from one of thetubularshafts and manually operated means for controlling the flow of fluidfrom the pump to the conduits.

2. Transmission means of the class described comprising a driven shaft,a gear connected with the driven shaft and having a pocket therein,

. 2,177,218 meshing with the gear of the driven shaft, a

tubular shaft on each countershait, a gear, having a pocket therein,connected with each tubular shaft, intermediate, slow and reverse speedgears on the drive shaft meshing with thefgears of the tubular shafts,clutch means in the pockets of the gears of the tubular shafts, eachclutch means including plunger-s, conduits in the drive andcountershafts leading to the plungers, a fluid tank, a pump, means fordriving the same from one of the tubularshafts, means for connecting theinlet of the pump with the tank, a conduit leading from the outlet ofthe pump, valve means connected with the last-mentioned conduit,

manually operated means for actuating the valve means, conduits leadingfrom the valve means to the conduits in the shafts, said valve meansselectively connecting the conduits leading from the outlet of the pumpto the conduits of the shafts, a return conduit leading from the valvemeans to the tank and by-pass means controlled by the valve means forconnecting the return conduit to the conduits which connect the valvemeans to the conduits of the shafts for returning the fluid to the tankfrom all of the conduits excepting the one which is in communicationwith the clutch means.

VERNON E. GLEASMAN.

